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First post at 0     second one   requaires walking  3m and back = 6 m

   third one is 12 m   then  18 m   

Arithmetic sequence  d = s    a1 = 0     a 200 = 0 + 6(199) = 1194

Sum =     200 (0+ 1194)/2 = 119400 meters   = 119.4 km

   yikes!

15! = 1307674368000 base 10 but you do not need to know this 

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I can work out that there will be 3 zeros in base 10 quite easily.  All I need to know is how many factors of 10 are there.

10=2*5 so I am going to pull out all the 2 and 5 factors.

1*2*3*4*5*6*7*8*9*10*11*12*13*14*15

    2   22 5 2    222  25       22       2    5 = 2^12 *  5^3  =  10^3 *2^9

so 15! can be divided by 10 three times so there will be 3 zeros in base 10  

Which is what the calc gave me in the first place.

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To find how many zeros there will be base 9 then you have to work out how many factors of 9 go into it.

9=3*3

So see how may threes go into it and half that number will be your answer for trailing zeros base 9

B flies from 72 2/5 feet below ....up too sea level and continues up to 721 4/5  ft  above sea level

72 2/5  +  721  4/5    = ..........    ft 

Cal, I just don't know.  I think the moderator who's blocking the picture detected answer activity and pulled the plug on me, but I don't know that for certain.  All I know is, I got about halfway through the answer and all of a sudden bam, I'm out of the question, and it happened twice in a row.   

The way to see the picture on a PC is to right click the image, then on the drop down menu that appears, click Copy Image Location.  Then open another page, locate your cursor in the URL field at the top of the page, and paste it in.  Then Enter on your keyboard. 

If the circumference is 24pi how can the arc be greater 

im in 8th grade and my brain is larger lol

15 factorial is 1307674368000 (thx Google) under base 10. When converted to base 12, it turns into 191529600000.

There are 5 zeroes.

It is 2 because there are 3 2s in255272

Area of largest circle   = pi 18^2        

    minus the smallest circle      pi 18^2 - pir^2

       divided by 2                      (pi 18^2 - pi r^2 ) / 2

           equalls the area of the smallest circle       (pi 18^2 - pi r^2 ) /2 = pi r^2

                                                                                    18^2 - r^2  = 2 r^2

                                                                                      18^2 = 3 r^2                       I'll let you take it from here.....

x = tan(36º) * 15 

surface areaA / Volume B  = 1/2

4 pi r^2  /  (4/3  pi r^3) = 1/2

3 / r  = 1/2

3 (2) = r = 6

Since your Q asks for a graphical solution,...here are the graphs from Desmos.....where they intersect is the solution

What is the value of x?

Hi Eliottbro16, why are you hiding the graphic?

x = 15ft * tan 36° = 10.9ft

  !

60% * x = 12

0.60x     =12

x =12 / 0.60 = 20 items on the list.

Here it is:     tan36 = .72654 = x /15    solve for x

Hi CalTheGreat!

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Please let me know if it worked.

  !

[8 x 17] - [8 + 17] = 111 is the largest number that you cannot make without breaking a box.

Try another example: 17 and 11 =[17 x 11] - [17+11] = 159

What is the remainder when 2013^2013 is divided by 13? = 8 the remainder.

What is the remainder when 17^77 is divided by 35? =12 the remainder

What is the remainder when 2+4+6+...+100 is divided by 7? =2550 mod 7 =2 the remainder.

For how many positive integers n less than 100 is  a multiple of 6? [Cannot find a single number that is a multiple of 6 !!!]

Angle D in △EDF is a right angle.

What is the value of tan F?

A) 4/5

B) 3/4

C) 4/3

D) 3/5

Hello Eliottbro16!

The value of tan F is B) 4/3.

  !

The volume of a right rectangular prism is equal to the product of the base area and the height. So if the base area of the smaller prism is 1/4 the base area of the larger prism, and the height of the smaller prism is  the height of the larger prism, the volume of the smaller prism is 1/2 * 1/4 = 1/8 the volume of the larger prism.